96 Grand Prix remote starter
 

I just bought my first car, a 96' Grand prix in really good condition. The only thing wrong that me or my dad cant fix is the remote starter. I bought it off a cab driver that I know and he said that when they hooked up the meter and everything they had to unplug the computer. When they did it "lost it's code". Now I'm wondering how to find the code and possible reprogram it.

Thanks for any and all help,
Morgan